Transcription of Introduction to Wireless System - ntuemc.tw
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Introduction to Wireless System - ntuemc.tw
Introduction to Wireless System Prof. Tzong-Lin Wu EMC Laboratory Department of Electrical Engineering National Taiwan University 2011/2/21 MW & RF Design / Prof. T. -L. Wu 1. 2011/2/21 MW & RF Design / Prof. T. -L. Wu 2. Wireless systems 1980 AT&T estimate: only 900,000 users at 2000 in USA. 1998 the number of cellular subscribers in the United States was over 60 million (already an error of more than 6000 percent). Many Wireless System around us: DBS, Direct Broadcast Satellite WLAN, Wireless local area networks Paging, GPS (global positioning System ). RFID . Mobile phones 2011/2/21 MW & RF Design / Prof. T. -L. Wu 3. Wireless systems and markets Classification of Wireless Systems Wireless System : communicate between two points without wired connection Sonic, infrared (but is easily blocked by even small obstructions), optical (but require a line-of-sight path), are possible media. Wireless System rely on RF or microwave signals in 100 MHz to 30 GHz.
1 Introduction to Wireless System Prof. Tzong-Lin Wu EMC Laboratory Department of Electrical Engineering National Taiwan University 2011/2/21 MW & RF Design / Prof. T. -L. Wu
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